Heater and draft-governing means therefor



Filed Feb. 10, 1928 N OLSON HEATER AND DRAFT GOVERNING MEANS THEREFOR I Sept. 18, 1928.

INVENTON. v

ATTORNEYS.

l atented Sept. 18,

UNITED STATES NELS OLSON, OF SUPERIOR, WISCONSIN.

HEATER AND DRAFT-GOVERNING" MEANS THEREFOR.

Application filed February 10, 1928 Serial No. 258,487.

My invention relates to heaters and draft governing means therefor, and has for its object. the provision of means for controlling the direction and volume of draft for furnaces and such other uses or purposes as it may serve. It consists of the structures, combinations and arrangements of parts hereinafter described and claimed.

In the drawings, Fig. 1 is a front elevation of a heater provided with my said invention showing the hereinafter described fresh air valve in open position and the hereinafter described base flue damper in open position. Fig. 2, is a central vertical 1ongitudinal section of a fragment of flue and of said fresh air valve, showing said valve in open position. Fig. 3, is a rear elevation of,

said valve showing the same in closed posi tion. Fig. 4, is an end elevation of said valve showing the same in open position. Fig. 5, is an end elevation of said valve showing the same in a second closed position.

In the drawing, 1 is a heater of any suittable structure provided at the bottom 1 with an ash pit and near the top with a head flue 2. Positioned in said head flue is a combination fresh air valve and damper 3. 'A base'flue 4: extends outwardly and upwardly from said ash pit, and in said base flue is positioned any suitable damper 4 The outer end of said base flue is turned into said head flue, or into a chimney (not shown) common to both flues, at a point at the opposite side of said valve from said heater.

Said combination valve and damper is preferably disc-shaped and is adapted to'extend nearly across the passage in the flue 2, and contains an air chamber 3 one of the disc-shaped walls of which is imperforate, the opposite disc-shaped wall being provided with air discharge ports formed therein in 7 any suitable manner, as the ports 3 adapted to discharge air toward said heater when said valve is in open position. Said valve also includes trunnions 3 and 3, by which it is mounted and may be rocked in said flue; one or both of which trunnions are tubular, or contain intake ports for admitting air to said chamber. Any suitable cut-01f or port covers adapted to automatically open or close ac cording as said valve is in open position or in closed position are provided, as the covers 3 3, adapted to cover the mouths of hoods 3 and 3 respectively, mounted on the outer ends of said trunnions. It will be observed that said covers will cover the mouths of said hoods during one halfof the travel of said valve and will uncover the same during the other half of such-travel. It will be further observed that when said disc is turned with the discharge ports directly downwardly, said port or hood covers will be open, and when said disc is turned to a vertical position, so that the discharge ports are directed transversely of said head flue, or when said disc is inverted so that said discharge ports are directed upwardly, said port or' hood covers will be closed. While said valve'might be entirely rotated without serious disadvantage, I prefer to provide stops of any suitable structure, as 5 and 6, to limit said valve to a rocking movement, whereby the opening of the port covers with the valve in a vertical position is avoided. I

To bank the fire, the valve is turned to open position with its discharge ports directed toward the fire. At the same time the base flue damper is also turned to open position, and the air gases and hydrocarbons will then descend'into the body ofthe fire and be consumed, the gaseous productsof combustion rising through the base flue. The draft will be approximately equalized by proper proportioning of the flues and by reason of one flue extending into the other or into a flue common to each of them. The usual check valves may be eliminated. By employing my invention, it is possible to close the fuel and ash pit doors tight without fear of gas explosions blowing such doorsopen or otherwise blowing into a room.

In order to force or build up the fire, the base flue damper will be closed, the head flue damper will be turned to vertical position in the flue, and a draft door in the ash pit will be opened to provide" an upward draft through the fire.

It is obvious that my invention may be altered or modified in various details within the spirit and scope of certain of my claims.

What I claim is" 1 l. The combination with a heater, of a head flue, a base flue, an air supply valve in said head flue, a draft control valve in said base flue, and a flue common to said head and base flues, said common flue being positioned on the opposite side of said valve and damper from said heater.

2. The combination of a heater, a head flue therefor, a combined damper and air.

air intake port formed therein, said valve beingadapted to rock on said trunnions, and

means for automatically closing and openwhen-said valve is turned to direct said discharge port toward said heater, and auto matic means for covering said intake port when said valve is turnedini one direction to direct said discharge portat right angles 4 The combination with a heater, of a head flue therefor, an air supply valve containing an air chamber and positioned in said flue and adapted to be rocked therein, said valvehaving a port formed in one face for discharging" air from said chamber, the opposite face of said valve being imperfoe rate, trunnions for said valve, one of said trunnionsihavingjan air intake port formed therein for'admitting air to said chamber when said. valve is turned to direct said discharge porttoward said heater, and automatic means for covering said intake port a when said valve is. rocked in one direction to direct said discharge port away from sald heater, said automatic means being adapted to automatically reopen said intake ort when said valve is counter rocked to irect' said head flue therefor, a damper positioned in said head flue, means forconducting air into said discharge port toward said heater; 5. The combination of 1 heater, a

flue between said; damper and said heater when said damper is closed, and automatic means for closing said air conductor when saiddamper is in wide open position.

In testimony whereof I hereunto afiix my signature.

NELS OLSON. 

